UFC 163 takes place Aug. 3 at HSBC Arena in Rio de Janeiro. The main card airs on pay-per-view following prelims on FX and Facebook.

Jung initially was slated to fight fellow contender Ricardo Lamas at UFC 162 next month, but the bout has been scratched. Lamas said he had no comment when contacted today by MMAjunkie.com (www.mmajunkie.com).

According to Pettis on Twitter: “Injuries are part of the sport. Small tear in my meniscus. I was so ready for this fight, this won’t stop me!back soon.”

Aldo is riding a 15-fight win streak that includes eight straight WEC/UFC title defenses. He’s looked downright dominant as he’s breezed through one notable challenger after another. His UFC title defenses have come over the likes of Mark Hominick, Kenny Florian, Chad Mendes and Frankie Edgar.

Jung, a former WEC contender, is undefeated since his move over to the UFC. The Korean fighter has topped Leonard Garcia, Hominick and Dustin Poirier under the UFC banner. The bout with Poirier, which earned “Fight of the Year” awards, came in May 2012 and marks his most recent appearance due to injuries.

Aldo is ranked No. 1 and Jung is No. 6 in the USA TODAY Sports/MMAjunkie.com MMA featherweight rankings. Lamas is actually three spots ahead of Jung at No. 3.

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